| article html file updated | 8 February 2020 05:40 CET | Update | https://www.mdpi.com/2075-5309/7/2/40 |
| article html file updated | 3 May 2019 22:25 CEST | Update | - |
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| article xml uploaded. | 12 May 2017 09:19 CEST | Original file | https://www.mdpi.com/2075-5309/7/2/40/xml |
| article pdf uploaded. | 12 May 2017 09:19 CEST | Version of Record | https://www.mdpi.com/2075-5309/7/2/40/pdf |
